SNAP-RING filter bags are used in filtration systems worldwide and have been for more than 30 years. N-100-P04S-50 is a rare size 04, 100 micron filter bag. They are designed to be an affordable and reliable filter option, made under ISO 9001 standards. This bag model is constructed using heavy-duty sewing techniques. The felt is nylon with a carbon steel ring sewn in the top. The ring, available in six different materials, forms a seal between the bag and housing when installed. Eaton Part Number: F31D37634 comes in box quantities of 50.